You can use any type of Greek cheese you want for this recipe, but the most traditional choice is feta. Feel free to substitute halloumi for the feta if you want the cheese to ooze a little bit when it is hot.

Crack the egg into a small dish and add the water. Scramble with a fork and then brush the egg mixture over the surface of each of the bread rounds. Sprinkle each with 1 tablespoon of the sesame seeds.

Place the baking sheet in the oven and bake until golden brown. This should take about 30 minutes.